package org.tigr.htc.common;

/*
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

public class Semaphore {
	
	protected int count;
	
	public Semaphore(int p_count) {
		count = p_count;
	}
	
	public synchronized void release() {
		++count;
		notify();
	}
	
	public void acquire() throws InterruptedException {
		if(Thread.interrupted()) throw new InterruptedException();
		
		synchronized(this) {
			try {
				while (count <= 0) wait();
				--count;
			} catch (InterruptedException ie) {
				notify();
				throw ie;
			}
		}
	}

	public int getCount() {
		return count;
	}

	
}
